What Is Spermicide? Spermicides contain chemicals to stop sperm from getting to an egg. They come in several different forms: cream, gel, foam, film, and suppositories. Spermicides can be used alone but are more effective when used with another birth control method, such as condoms or a diaphragm. How Does Spermicide Work? Spermicides block the cervix (the opening to the uterus) and slow sperm down to make it harder for them to swim to an egg. In order to work, the spermicide must be placed deep in the vagina close to the cervix. Creams, gels, and foams are squirted into the vagina using an applicator. Other types of spermicides include vaginal contraceptive film (VCF), a thin sheet placed in the back of vagina by hand, and vaginal suppositories. Spermicides must be placed in the vagina before sexual intercourse. The instructions will say how long before sex the spermicide should be used. Most must be placed in the vagina at least 10 to 15 minutes before sex so they have enough time to dissolve and spread. Many forms of spermicides are effective for only 1 hour after they are inserted. More spermicide should be used if more than 1 hour passes before sex, or if a couple is going to have sex again. A girl shouldn't douche for at least 6 hours after a couple has sex using spermicide as birth control. How Well Does Spermicide Work? Over the course of a year, about 28 out of 100 typical couples who use spermicide will have an accidental pregnancy. Spermicides are not as effective on their own as many other types of birth control and work best when used with another form of birth control. Does Spermicide Help Prevent STDs? No. Spermicide does not protect against STDs. Couples having sex must always use condoms to protect against STDs. Are There Any Side Effects With Spermicide? Spermicides may irritate the vagina and surrounding skin. This irritation may make it easier to become infected with STDs like HIV. Those who use spermicide may be more likely to develop urinary tract infections. Who Can Use Spermicide? Spermicide may be a good birth control option for couples who can plan in advance of having sex and who want extra protection when they use condoms or other barrier methods of contraception. Where Is Spermicide Available? Spermicides are available without a prescription in drugstores and some supermarkets. (In some stores, they're in the "Family Planning" aisle.) They're often found near the condoms and feminine hygiene products. Take care when choosing a spermicide — the packages may look like those of some feminine hygiene products, such as douches or washes, which don't provide any birth control protection. How Much Does Spermicide Cost? Depending on the type of spermicide chosen (film is more expensive than gel), spermicide costs about $0.60 to $3 per use. When Should I Call the Doctor? Someone who uses spermicide should call the doctor if she: might be pregnant has a change in the smell or color of her vaginal discharge develops a rash around the vagina has pain when peeing or needs to pee often has unexplained fever or chills has belly or pelvic pain has pain during sex Back to Articles Related Articles About Birth Control Before you consider having sex, you need to know how to protect yourself. Read this article to get the basics on birth control. Read More Birth Control Methods: How Well Do They Work? Some birth control methods work better than others. This chart compares how well different birth control methods work. Read More Gyn Checkups Girls should get their first gynecological checkup between ages 13 and 15. Find out what happens during a yearly gyn visit -- and why most girls don't get internal exams. Read More The IUD Before you consider having sex, you need to know how to protect yourself. Learn more about the IUD and to find out how well it works for teens. Read More Talking to Your Partner About Condoms Some people - even those who are having sex - are embarrassed by the topic of condoms. Here are some tips for talking about condoms with your partner. Read More How Can I Get on the Pill Without Telling My Parents? Find out what the experts have to say. Read More Do You Need a Pelvic Exam to Get Birth Control? Find out what the experts have to say. Read More When Is it Time to Start Seeing a Gynecologist? Find out what the experts have to say. Read More Female Reproductive System Why do girls get periods? What goes on when a woman gets pregnant? What can go wrong with the female reproductive system? Find the answers to these questions and more in this article for teens. Read More STDs (Sexually Transmitted Diseases) You've probably heard lots of discouraging news about sexually transmitted diseases. The good news is that STDs can be prevented. Find out how to protect yourself. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.